✨ feat: add github repository card extension feature

- remove astro-compress to improve build speed
- add target and rel attributes to footer links
- rename unocss opacity utility from 'opacity' to 'op'
- update PostList component's page logic from 'isTag' to 'isHome'
- create extend.css file for markdown extended features
- reorganize and sort styles in heti.css
- fix inline code wrapping issue

src/components/Header.astro

@@ -60,7 +60,7 @@ const SubtitleTag = isPost ? 'div' : 'h2'
     <SubtitleTag
       class:list={[
         isPost
-          ? `opacity-0 lg:opacity-100`
+          ? `op-0 lg:op-100`
           : 'w-75% lg:w-full',
         'c-secondary font-navbar text-3.5 lg:text-4',
       ]}